Measurement-computing Personal Daq rev.6.0 Uživatelský manuál stáhnout pdf (Strana 23)

Personal Daq User’s Manual

878595 General Information & Specifications 2-3

Theory of Operation

Universal Serial Bus (USB)

The Universal Serial Bus is ideal for data acquisition applications. Since USB ports

(located on the PC) provide power, only one cable is needed to link an acquisition

device to the PC. In addition, USB’s high-speed data transfer (from the data acquisition

device to the PC) allows for real-time display of acquired data while eliminating the

need for additional memory in the acquisition device. USB supports transfer rates up to

12 Mbytes/sec and supports real-time data transfer. Standard USB connectors can be

identified by a USB icon.

Power Line Rejection

Personal Daq can take readings while making use of 50/60Hz line cycle rejection (120 dB). While in the

line cycle rejection mode, the maximum sample rate is as follows:

• 50 Hz rejection: 7.7 samples/sec

• 60 Hz rejection: 9.2 samples/sec

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Measurement-computing Personal Daq rev.6.0 Uživatelský manuál Strana 23